Expressions Pretest

Find the value of: 8 + 9 × 3 - 4 =

• 47

• 31

• 39

• 45

Simplify:
5x - 6x - 8x + 7 

• -9x + 7

• -9x -  7

• 9x + 7 

• 9x - 7

What is an algebraic expression?

• a letter or a symbol used to represent an unknown value

• an expression that contains numbers, operations, and one or more variables

• a specific number whose values does not change

Which expression is the same as:

"A number times by five"

• x + 5

• 5x

• ^x/₅

• x - 5

Which expression is the same as:

"A number divided by five"

• x + 5

• 5x

• ^x/₅

• x - 5

Which expression is the same as:

"A number plus five"

• x + 5

• 5x

• ^x/₅

• x - 5

Which expression is the same as:

"Five less than a number"

• x + 5

• 5x

• ^x/₅

• x - 5

Which expression is the same as:

"Five minus a number"

• 5 - x

• x - 5

Evaluate the expression when x = 8:

2x + x - 10

• 34

• 22

• 14

• 24

Evaluate the expression when x =2:

3x + 8

• 13

• 14

• 15

• 16